Guide bushing



O. R. BRINEY GUIDE BUSHING Filed July 17, 1922 i El -3 or ron'rrno, rrrcssrenri.

@UKIDE BUSHING Application filled July To zaZZ whom it may concern:

Be it lrnown that E, Ums R. Bnrnnr, s citizen or the United Ststes, sncl e resiclent of Pontiec county or Ueklenol, and State of liticlrigznzi iieve invented; it new end-useifnl Improvement in Gnicle Bushings, of

which the followino is c specification. My invention re letes to guiole bushings generally and to guide bushing for tools such as drills sncl resmers particularly.

The object of my invention is to provide it guide bushing which is simple of con" struction, in which n slip hustling is held to sliner bushing Toy e rotstive movement loetlie two "ousliings, in which these lonsliings can not ioclr or wedge themselves to each otlrier end in which the bush.- ing is prevented from rotary end from longitiidinel movement in the iiner lnisiiing within certain limits.

Vsrions meclienisms con be designed. to sccomplisli myebject; tour being shown in the eccompenymg clrewings in which iga l is e side VlW of s, guide smelting having as liner bushing snot it slip bushing, psrtly broken to show plainly how these two bushings ere held to eecli other; 2 is ssection on line 2-2 Fig. i; ig. 3 is e sitle View of it slip bushing oriented for sli of the mool i lCiEtiDKRS oi? liner bushings siiown enol is pertly broken ewey to show its interior plainly; l is a bottom entl VlGW of Fig. 3; Fig. 5 n siole View oi liner bushing portly lorolren owes to plsinly sliow enotlier stop meciisnism; Fig. t is plan VilGW of Fig. 5; Fig. '73 is at side View or liner bushing portly broken sway to pieinly show still another stop meclisnism; ig. 8 is olen View of l} portly .iorolren ewey to pleinly show the stop meclr snisin; Q? is o, stole View or e liner lmsiiing; portly orolren ewey plsiniy show still enotlier stop mechanism; Fig. 10 is e pie n View is. 9 partly ibrolren ewoy to plainly show the stop mechanism; Fig. ii is s s'icleriew pertly iorolren swey of s liner bushing with e modified holding groove.

Similer reference clierscters reifor similsr throughout the views.

in guide bushings it is importent enrl very erlvsntegeons tlret the slip bushing losprevented from extensive longitnclinel movement sncl also from rotetwe movement tlie't nreotieslly all or the weer es USA1413.

legs

13%. Serial No. 575,539.

1918113 n the inner well of the slip bushing and the slip bushing only needs to be placecl when worn.

An effective manner or" looking it slip bushing to s liner bushing is an eccentric arrangement which, generally, is but the olcler arrangements have the rliseclven tege oi iocking the bushings so tight to each other that considerable time and efiort is consumed in releasing the bushings snti often results either in considerable msr or in total destruction of one or both bushings. The present invention aims to provide on easy engagement between the two onshmgs, a positive means to errest the rotetive move ment between the two bushings withoirt weciging, and it means to positively onslungs to each other longitmiinelly out 'weclging.

Referring: now particularly to the tirsw Figs. 1, 7 show s gui e having the liner bustling A the slip bushing The liner bushing lies the bociy viclecl with the concentric mein sore i the hescl 12 provided with the eccentric bore 13 oncl the concentric recess The stop pin 15' is inserted substantially st the (teenest point of the recess 1 lend. extends c r A is peenecl over at is to prevent the pin is from workingont. It is preferred that the face 17 loo bevelecl es shown so that chips or other which felis into this recess "is may reeciily roll off sncl clown through the "core it. 1" is time consuming oncl disagreeable operation to remove foreign matter from such 2; small recess which operation is eliminste i icy bevelling the shoulder "for foreign matter to rest Even if small particles of foreign matter rio coliect in the recess encl ere not removed. it will not interfere with the oceretionqo'i wary thereinto end the metal or the bushing face 17 thereby leaving no the locking means since the parts fit loose ty 3 llll dill

relation to the bushing A, that the radially highest point of the flange 18 is substantially opposite the pin 15.

The slip bushing B has the body 19 adapted to fit into the main bore 11 of the bushing A and is provided with the concentric bore 20 adapted to whatever object it is proposed to guide. The bushing B further has the head 21 concentric with the body .19 and is provided with the lubricant chamber 22.

At proper distance from the face 23 of the head 21, the body 19 is provided with the previously mentioned eccentric flange 18 having the bevel face 24 substantially cor. responding to the bevel face 17 and is otherwise adapted to enter the recess 14 and extends substantially to the highest point (radially) and forms the shoulder 28 there.

The flange 25 is adapted to enter the groove 26 and the groove 27 is provided to facilitate the grinding of the body 19.

lit is noted here that with the arrangement of elements shown in Figs. 1, 2, 3, and d, as well as those described later, there is no necessity of a close fit between the elements 17 and 24:, or 18 and 1 1, or 25 and 26, as previously mentioned, and all elements, except the bodies and 19, need not fit closely; in fact it is preferred that they fit loosely so that no final finishing is required thereon and whatever distortion thereof may take place during the hardening or other operation on these bushings does not affect the working thereof. This arrangement of elements eliminates considerable time and expense in their production as well as in their operation and works fully as good as if all of the joints were closely fitted.

After the bushings are made up as set forth, the bushing B is first inserted into the bushing A. with the flange 18 opposite the pin as previously mentioned and indicated in light lines in Fig. 1 at 36. A right handed rotative movement of the bushing B then causes the flange 18 to enter the recess 14: and the flange to enter the groove 26 and both continue to advance therein until the shoulder 28 abuts on the pin 15 which acts as a stop.

The rotative action of a drill or other tool will not produce any further rotative movement of the bushing B and all possibility of the bushings being wedged to each other is eliminated.

As long as the bushings are in the position shown in Figs 1 and 2, the flanges and grooves thereon will prevent longitudinal movement between the bushings except to the slight extent of loose fitting between them.

Such slight longitudinal movement does not afiect the operation or? the guide bushing since the bodies lit closely to each other diametrically and thereby guide a tool or other object to a desired positlon even it there is incense a limited longitudinal movement between the bushings.

When it 1s desired to remove the slip bushing, it is only necessary to partially rotate it left handed and lift it out of the liner bushing.

When it is desired to use these guide bushings for left handedly rotating tools or objects, the flange 18 is formed on the side opposite to that shown in Fig. 2.

Figs. 5 and 6 show a guide bushing having all of the features of the one first shown and described. In this instance, however, the rotative movement of the bushing B is arrested by the stop 29 which is formed by bending a portion oi the flange 25 downward in place of the pin 15.

Figs. 7 and 8 show a guide bushing having all of the features of the one first shown and described. In this instance, however, the rotative movement of the bushing B is arrested by the stop pin 30 which is inserted in the head 12 as shown.

Figs. 9 and 10 show a guide bushing having all of the features of the one first shown and'described. In this instance, however, the shoulder 31 is formed directly in the bushing A, but the formation of this shoulder is somewhat expensive Fig. 11 shows a liner bushing having the recess 32 equivalent to the recess 14 but having its walls 33 and 34 parallel instead of the inclined wall 17. In this instance the eccentric fiange 35 must also have parallel sides instead of the one bevel side 24. As previously stated, the recess shown here has the disadvantage of time consuming clean: ing and is recommended only when a bevel bottom recess can not be carried out. Any of the stop means shown may be employed in connection with this recess.

I am aware that, prior to my invention, guide bushings have been made with rotary locking means. I therefore do not claim such feature broadly; but

I claim 1. A. guide bushing comprising, a liner bushing provided with a concentric bore and a concentric recess adjacent this bore and an eccentric counterbore adjacent this recess, a stop means traversing said recess, a slip bushing provided with a concentric bore, an eccentric flange on said slip bushing and adapted to said recess, and a stop shoulder on said eccentric flange to engage said stop means.

2. A guide bushing comprising, a linen bushing provided with a concentric bore and a concentric recess adjacent this bore and an eccentric counterbore adjacent this recess forming a flange at one side of this recess a stop means traversing said recess at said flange, a slip bushingprovided with a head and a. concentric bore. an eccentric flange on said slip bushing and adapted to said reeess emi forming a groove between said liezil' end this eccentric flange e1 one side lo engage seid' flange on seiol liner bushing, and a stop shoulder on said eccentric flange to engage said step means.

3. A guide bushing comprising, e liner bushing provided with e i'ecess lieving an inclined bottom well and an obstruction therein, and a slip bushing previded with an eccentric flange adapted to seifl eeeess and to said inclined well therein end having e shoulder adapted to elmt on said obsti'uciion.

A guide bushing comprising, s liner bushing provided with e conoentiic bore and ecencentric recess having its lower well inclineel anti en eccentric eennterbore, e stop means iEEWQESlHg' seiil recess, e slip is provided with e concentric here, an eccentiic flange en seidl slip bushing and eds-pied to said recess and ilie lower WallfilhQTQOf inelineel zine} engaging said inclinedwell of seid recess end e stop shenldei" on said eocentric flange to engage seiol stop means.

5. A guide bushing comprising, a liner bushing provided with a recess having its lower well incline-(l end lievin en elisli'nclion blienein, e slip bushing provided with an eccentric flange loosely lilting into said recess co said inclined Well therein enol heaving e slionlilei' adapted to ebut on seidl obstruction.

Sill 

